<template>
	<view class="cart-container" v-if="cart.length !== 0">
		<!-- 使用自定义收货地址组件 -->
		<my-address></my-address>
		
		<!-- 商品列表的标题区域 -->
		<view class="cart-title">
			<!-- 左侧图标 -->
			<uni-icons type="shop" size="18"></uni-icons>
			<!-- 描述文字 -->
			<text class="cart-title-text">购物车</text>
		</view>
		
		<!-- 循环渲染购物车中的商品数据 -->
		<uni-swipe-action>
			<block v-for="(goods, i) in cart" :key="i">
				<uni-swipe-action-item :right-options="options" @click="swipeActionClickHandler(goods)">
					<!-- 将自定义组件my-goods进行调用 -->
					<my-goods :goods="goods" :show-radio="true" :show-num="true" @radio-change="radioChangeHandler" @num-change="numChangeHandler"></my-goods>
				</uni-swipe-action-item>				
			</block>
		</uni-swipe-action>
		
		<!-- 使用自定义的结算组件 -->
		<my-settle></my-settle>
	</view>
	
	<!-- 购物车数量为0，显示的空白区域 -->
	<view class="empty-cart" v-else>
		<image src="/static/cart_empty@2x.png" class="empty-img"></image>
		<text class="tip-text">空空如也</text>
	</view>
</template>

<script>
	import badgeMix from '@/mixins/tabbar-badge.js'
	import { mapState, mapMutations } from 'vuex'
	
	export default {
		mixins: [badgeMix],
		data() {
			return {
				// 滑动删除购物车内商品
				options: [{
					text: '删除',
					style: {
						backgroundColor: '#c00000'
					}
				}]
			};
		},
		methods: {
			...mapMutations('m_cart', ['updateGoodsState', 'updateGoodsCount', 'removeGoodsById']),
			
			// 获取商品选择状态
			radioChangeHandler(e) {
				this.updateGoodsState(e)
			},
			// 获取商品的价格信息
			numChangeHandler(e) {
				this.updateGoodsCount(e)
			},
			// 实现商品删除	
			swipeActionClickHandler(goods) {
				this.removeGoodsById(goods.goods_id)
			}
		},
		computed: {
			// 将购物车的vuex(m_cart模块)中的cart数组映射到当前页面的计算属性中
			...mapState('m_cart', ['cart'])
		}
	}
</script>

<style lang="scss">
.cart-container{
	padding-bottom: 50px;
}
.cart-title{
	height: 40px;
	display: flex;
	align-items: center;
	padding-left: 5px;
	border-bottom: 1px solid #efefef;
	.cart-title-text{
		font-size: 14px;
		margin-left: 10px;
	}
}
.empty-cart {
	display: flex;
	flex-direction: column;
	align-items: center;
	padding-top: 150px;
	.empty-img {
		width: 90px;
		height: 90px;
	}
	.tip-text {
		font-size: 12px;
		color: gray;
		margin-top: 15px;
	}
}

</style>
